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LM2904
Low Power Dual Operational Amplifier

Internally frequency compensated Large DC voltage gain: 100dB Wide bandwidth (unity gain): 1.1MHz (temperature compensated) Very low supply current/op (500A) essentially independent of supply voltage Low input bias current: 20nA (temperature compensated) Low input offset current: 2nA Input common-mode voltage range includes ground Differential input voltage range equal to the power supply voltage Large output voltage swing 0V to (VCC - 1.5V) P TSSOP8 (Thin Shrink Small Outline Package) D SO-8 (Plastic Micropackage)
N DIP8 (Plastic Package)
Description
This circuit consists of two independent, high gain, internally frequency compensated which were designed specifically for automotive and industrial control system. It operates from a single power supply over a wide range of voltages. The low power supply drain is independent of the magnitude of the power supply voltage. Application areas include transducer amplifiers, DC gain blocks and all the conventional op-amp circuits which now can be more easily implemented in single power supply systems. For example, these circuits can be directly supplied with off the standard +5V which is used in logic systems and will easily provide the required interface electronics without requiring any additional power supply. In the linear mode the input common-mode voltage range includes ground and the output voltage can also swing to ground, even though operated from only a single power supply voltage.
S Mini SO-8 (Mini SO Package)
Pin Connection (top view)
1 2 3 4 + + 8 7 6 5
October 2005
Rev 3 1/15
www.st.com
15
LM2904
Order Codes
Part Number LM2904N LM2904D/DT LM2904PT LM2904ST LM2904YD/YDT LM2904YPT LM2904YST -40, +125C Temperature Range Package DIP8 SO-8 TSSOP8 (Thin Shrink Outline Package) mini SO-8 SO-8 (automotive grade level) TSSOP8 (automotive grade level) minI SO-8 (automotive grade level) Packing Tube Tube or Tape & Reel 2904 Tape & Reel Tape & Reel Tube or Tape & Reel 2904Y Tape & Reel Tape & Reel k409 K403 Marking LM2904N
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LM2904
Absolute Maximum Ratings
1
Absolute Maximum Ratings
Table 1.
Symbol VCC Vid VI Supply Voltage Differential Input Voltage Input Voltage Output Short-circuit to Ground (1) ptot Iin Toper Tstg Power Dissipation (2) Input Current (3) Operating Free-Air Temperature Range Storage Temperature Range Thermal Resistance Junction to Ambient Rthja SO-8 TSSOP8 DIP8 MiniSO-8 HBM: Human Body Model(4) ESD MM: Machine Model(5) CDM: Charged Device Model Vcc+ 125 120 85 190 300 200 1.5 C/W 500 50 -40 to +125 -65 to +150 mW mA C C
Key parameters and their absolute maximum ratings
Parameter Value +32 +32 -0.3 to +32 Unit V V V
V V kV
1. Short-circuits from the output to V CC can cause excessive heating if > 15V. The maximum output current is approximately 40mA, independent of the magnitude of V CC. Destructive dissipation can result from simultaneous short-circuits on all amplifiers. 2. Power dissipation must be considered to ensure maximum junction temperature (Tj) is not exceeded. 3. This input current only exists when the voltage at any of the input leads is driven negative. It is due to the collector-base junction of the input PNP transistor becoming forward biased and thereby acting as input diodes clamps. In addition to this diode action, there is also NPN parasitic action on the IC chip. This transistor action can cause the output voltages of the op-amps to go to the V CC voltage level (or to ground for a large overdrive) for the time duration than an input is driven negative. This is not destructive and normal output will set up again for input voltage higher than 0.3V. 4. Human body model, 100pF discharged through a 1.5k resistor into pin of device. 5. Machine model ESD, a 200pF cap is charged to the specified voltage, then discharged directly into the IC with no external series resistor (internal resistor < 5), into pin to pin of device.
3/15
Typical Application Schematic
LM2904
2
Typical Application Schematic
Figure 1. Schematic Diagram (1/2 LM2904)
V CC
6A
4A CC
100A Q5 Q6
Inverting input
Q2 Q1
Q3 Q4 Q11 Q7 R SC
Non-inverting input
Output
Q13 Q10 Q8 Q9 Q12
A 50m GND
4/15
LM2904
Electrical Characteristics
3
Electrical Characteristics
Table 2.
Symbol
VCC+ = 5V, Vcc- = Ground, VO = 1.4V, Tamb = 25C (unless otherwise specified)
Parameter Input Offset Voltage (1) Tamb = 25C Tmin Tamb T max. Input Offset Current Tamb = 25C Tmin Tamb T max. Input Bias Current (2) Tamb = 25C Tmin Tamb T max. Large Signal Voltage Gain VCC+ = +15V,RL=2k, Vo = 1.4V to 11.4V Tamb = 25C Tmin Tamb T max. Supply Voltage Rejection Ratio (RS 10k) Tamb = 25C Tmin Tamb T max. Supply Current, all Amp, no load Tamb = 25C, VCC = +5V Tmin Tamb T max., VCC = +30V Input Common Mode Voltage Range (Vcc= +30V) (3) Tamb = 25C Tmin Tamb T max. Common-mode Rejection Ratio (RS = 10k) Tamb = 25C Tmin Tamb T max. Output Short-circuit Current VCC = +15V, Vo = +2V, Vid = +1V Output Sink Current VO = 2V, V CC = +5V VO = +0.2V, V CC = +15V Output Voltage Swing (RL = 2k Tamb = 25C Tmin Tamb T max Min. Typ. Max. Unit
Vio
2
7 9
mV
Iio
2
30 40
nA
Iib
20
150 200
nA
Avd
50 25
100
V/ mV
SVR
65 65
100
dB
Icc
0.7
1.2 2
mA
Vicm
0 0
VCC+ -1.5 VCC + -2 85
V
CMR
70 60
dB
Isource
20
40
60
mA
Isink
10 12
20 50 VCC+ -1.5 VCC + -2
mA A
VOPP
0 0
V
5/15
Electrical Characteristics
LM2904
Symbol
Parameter High Level Output Voltage (Vcc + 30V) Tamb = +25C, RL = 2k Tmin Tamb T max. Tamb = +25C, RL = 10k Tmin Tamb T max. Low Level Output Voltage (RL = 10k) Tamb = +25C Tmin Tamb T max Slew Rate Vcc = 15V, Vi = 0.5 to 3V, RL = 2k, CL = 100pF, unity gain Gain Bandwidth Product f = 100kHz Vcc = 30V, Vin = 10mV, RL = 2k, CL = 100pF Total Harmonic Distortion f = 1kHz, AV = 20dB, RL = 2k, Vo = 2Vpp, CL = 100pF, Vcc = 30V Input Offset Voltage Drift Input Offset Current Drift
Min.
Typ.
Max.
Unit
VOH
26 26 27 27
27 28
V
VOL
5
20 20
mV
SR
V/s 0.3 0.7 0.6 1.1 MHz
GBP
THD
% 0.02 7 10 30 300 V/ C pA/ C dB
DVio DIio
(4) VO1/VO2 Channel Separation 1kHz f 20kHz
120
1.
VO = 1.4V, RS = 0, 5V < V CC+ < 30V, 0V < V ic < VCC+ - 1.5V
2. The direction of the input current is out of the IC. This current is essentially constant, independent of the state of the output, so no loading charge change exists on the input lines 3. The input common-mode voltage of either input signal voltage should not be allowed to go negative by more than 0.3V. The upper end of the common-mode voltage range is V CC+ -1.5V, but either or both inputs can go to +32V without damage. 4. Due to the proximity of external components insure that coupling is not originating via stray capacitance between these external parts. This typically can be detected as this type of capacitance increases at higher frequencies.
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LM2904
Figure 2. Open loop frequency response Figure 3.
Electrical Characteristics
Large signal frequency response
LARGE SIGNAL FREQUENCY RESPONSE
20
10M
100k 1k +15V VO +7V + 2k
OPEN LOOP FREQUENCY RESPONSE (NOTE 3)
140 120
0.1F VI VCC/2 + VO
OUTPUT SWING (Vpp)
-
VOLTAGE GAIN (dB)
100 80 60 40 20 0
1.0 10 100
VCC
15
VI
VCC = 30V & -55C Tamb +125C
10
5
VCC = +10 to + 15V & -55C Tamb +125C 1k 10k 100k 1M 10M
0
1k 10k 100k 1M
FREQUENCY (Hz)
FREQUENCY (Hz)
Figure 4.
Voltage follower pulse response
VOLAGE FOLLOWER PULSE RESPONSE
4
Figure 5.
Output characteristics
OUTPUT CHARACTERISTICS
10 VCC = +5V VCC = +15V VCC = +30V 1
v cc v cc /2 IO + VO
OUTPUT VOLTAGE (V)
3 2 1 0 3
RL 2 k VCC = +15V
OUTPUT VOLTAGE (V)
0.1
INPUT VOLTAGE (V)
2 1
0.01
0 10 20 30 40
Tamb = +25C 0,01 0,1 1 10 100
0,001
TIME (s)
OUTPUT SINK CURRENT ( A)
Figure 6.
Voltage follower pulse response
VOLTAGE FOLLOWER PULSSE RESPONSE (SMALL SIGNAL)
500
Figure 7.
Output characteristics
OUTPUT CHARACTERISTICS
8
V CC
OUTPUT VOLTAGE REFERENCED
OUTPUT VOLTAGE (mV)
7 6
V CC /2 + VO IO
450
el
+ eO 50pF
TO VCC+ (V)
400 Input 350 Output 300 Tamb = +25C VCC = 30 V
0 1 2 3 4 5 6 7 8
5 4 3 2 1
0,001 0,01
-
Independent of V CC T amb = +25C
250
0,1
1
10
100
TIME (ms)
OUTPUT SOURCE CURRENT (mA)
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Electrical Characteristics
Figure 8. Input current
INPUT CURRENT (Note 1)
90 80 90 VI = 0 V VCC = +30 V
LM2904
Figure 9. Current limiting
CURRENT LIMITING (Note 1)
80 70 60 50 40 30 20 10 0
-55 -35 -15 5 25 45 65 85 105 125
+ -
OUTPUT CURRENT (mA)
INPUT CURRENT (mA)
IO
70 60 50 40 30 20 10 0
-55 -35 -15 5 25 45 65 85 105 125
VCC = +15 V
VCC = +5 V
TEMPERATURE (C)
TEMPERATURE (C)
Figure 10. Input voltage range
INPUT VOLTAGE RANGE
15
Figure 11. Supply current
SUPPLY CURRENT
4
VCC
SUPPLY CURRENT (mA)
INPUT VOLTAGE (V)
3
mA
ID
10
Negative
-
2
+
5
Positive
Tamb = 0C to +125C 1 Tamb = -55C
0
5
10
15
0
10
20
30
POWER SUPPLY VOLTAGE (V)
POSITIVE SUPPLY VOLTAGE (V)
Figure 12. Positive supply voltage
160
Figure 13. Positive supply voltage
100
INPUT CURRENT (nA)
R L = 20k
VOLTAGE GAIN (dB)
120 R L = 2k
75
80
50
40
25
Tamb= +25C
0
10
20
30
40
POSITIVE SUPPLY VOLTAGE (V)
0 10 20 30 POSITIVE SUPPLY VOLTAGE (V)
8/15
LM2904
Figure 14. Positive supply voltage
160 R L = 20k
VOLTAGE GAIN (dB)
Electrical Characteristics
Figure 15. Gain bandwidth product
GAIN BANDWIDTH PRODUCT (MHz) 1.5 1.35 1.2 1.05 0.9 0.75 0.6 0.45 0.3 0.15 0 -55-35-15 5 25 45 65 85 105 125 TEMPERATURE (C) VCC = 15V
120 R L = 2k
80
40
0
10
20
30
POSITIVE SUPPLY VOLTAGE (V)
Figure 16. Power supply rejection ratio
POWER SUPPLY REJECTION RATIO (dB)
Figure 17. Common mode rejection ratio
COMMON MODE REJECTION RATIO (dB)
115 110 SVR 105 100 95 90 85 80 75 70 65 60-55-35-15 5 25 45 65 85 105 125 TEMPERATURE (C)
115 110 105 100 95 90 85 80 75 70 65 60-55-35-15 5 25 45 65 85 105 125 TEMPERATURE (C)
Typical single - supply applications Figure 18. AC coupled inverting amplifier
Rf 100k R1 10k
1/2 LM2904
Figure 19. AC coupled non-inverting amplifier
R1 100k C1 0.1F R2 1M
CI
R1 (as shown AV = -10) Co 0 eo RL 10k 2VPP
AV = -
Rf
A V= 1 + R2 R1 (as shown A V = 11) Co 0 eo RL 10k 2VPP
CI
1/2 LM2904
eI ~ R2 VCC 100k
RB 6.2k R3 100k
RB 6.2k eI ~ R3 1M
R4 100k
VCC
C1 10F
C2 10F
R5 100k
9/15
Electrical Characteristics
Figure 20. Non-inverting DC gain Figure 21. DC summing amplifier
e1 100k
LM2904
10k 1/2 LM2904
eO
A V = 1 + R2 R1 (As shown A V = 101) +5V
e2 e3 100k 100k 100k e4 100k
eo = e1 + e2 - e3 - e4 where (e1 + e2) (e3 + e4) to keep eo 0V
100k
1/2 LM2904
eO
R2 1M R1 10k
e
O
(V)
0
e I (mV)
Figure 22. High input Z, DC differential amplifier
Figure 23. Using symmetrical amplifiers to reduce input current
1/2
I eI
R2 100k R1 100k
1/2 LM2904
I
I B LM2904 2N 929 0.001 F
eo
R4 100k R3 100k
1/2 LM2904
IB
+V1 +V2
If R1 = R5 and R3 = R4 = R6 = R7 eo = [ 1 + 2R1 ] (e2 - e1) R2 As shown eo = 101 (e2 - e1)
Vo
IB
IB 3M IB
1/2 LM2904
Input current compensation
1.5M
Figure 24. Low drift peak detector
Figure 25. Active bandpass filter
IB
1/2
R1 100k C1 330pF R2 100k +V1
1/2 LM2904
1/2 LM2904
I B LM2904 1F C 2IB 2N 929 2IB R 1M Zo
eo
R5 470k
1/2 LM2904
eI ZI
R4 10M C2 330pF
1/2 LM2904
0.001 F IB 3R 3M IB
1/2 LM2904
R3 100k
R6 470k Vo R7 100k VCC R8 100k C3 10F
Input current compensation
Fo = 1kHz Q = 50 Av = 100 (40dB)
10/15
LM2904
Package Mechanical Data
4
Package Mechanical Data
In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. These packages have a Lead-free second level interconnect. The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.
4.1
DIP8 Package
Plastic DIP-8 MECHANICAL DATA
mm. DIM. MIN. A a1 B B1 b b1 D E e e3 e4 F I L Z 0.44 3.3 1.6 0.017 8.8 2.54 7.62 7.62 7.1 4.8 0.130 0.063 0.38 0.7 1.39 0.91 0.5 0.5 9.8 0.346 0.100 0.300 0.300 0.280 0.189 0.015 1.65 1.04 TYP 3.3 0.028 0.055 0.036 0.020 0.020 0.386 0.065 0.041 MAX. MIN. TYP. 0.130 MAX. inch
P001F
11/15
Package Mechanical Data
LM2904
4.2
SO-8 Package
SO-8 MECHANICAL DATA
DIM. A A1 A2 B C D E e H h L k ddd 0.1 5.80 0.25 0.40 mm. MIN. 1.35 0.10 1.10 0.33 0.19 4.80 3.80 1.27 6.20 0.50 1.27 0.228 0.010 0.016 TYP MAX. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 MIN. 0.053 0.04 0.043 0.013 0.007 0.189 0.150 0.050 0.244 0.020 0.050 inch TYP. MAX. 0.069 0.010 0.065 0.020 0.010 0.197 0.157
8 (max.)
0.04
0016023/C
12/15
LM2904
Package Mechanical Data
4.3
TSSOP8 Package
TSSOP8 MECHANICAL DATA
mm. DIM. MIN. A A1 A2 b c D E E1 e K L L1 0 0.45 0.60 1 0.05 0.80 0.19 0.09 2.90 6.20 4.30 3.00 6.40 4.40 0.65 8 0.75 0 0.018 0.024 0.039 1.00 TYP MAX. 1.2 0.15 1.05 0.30 0.20 3.10 6.60 4.50 0.002 0.031 0.007 0.004 0.114 0.244 0.169 0.118 0.252 0.173 0.0256 8 0.030 0.039 MIN. TYP. MAX. 0.047 0.006 0.041 0.012 0.008 0.122 0.260 0.177 inch
0079397/D
13/15
Package Mechanical Data
LM2904
4.4
Mini SO-8 Package
14/15
LM2904
Revision History
5
Revision History
Date Jan. 2002 Revision 1 Initial release. 1 - PPAP references inserted in the datasheet see table Order Codes on page 2 2 - ESD protection inserted in Table 1.: Key parameters and their absolute maximum ratings on page 4. PPAP part numbers added in table Order Codes on page 2. Changes
June 2005
2
Oct. 2005
3
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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